US4808375A - Process for producing aluminium-silicon alloy with content of silicon of 2-22% by mass - Google Patents

Process for producing aluminium-silicon alloy with content of silicon of 2-22% by mass Download PDF

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Publication number
US4808375A
US4808375A US07/025,166 US2516687A US4808375A US 4808375 A US4808375 A US 4808375A US 2516687 A US2516687 A US 2516687A US 4808375 A US4808375 A US 4808375A
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United States
Prior art keywords
silicon
melt
alloy
aluminium
agitation
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Expired - Fee Related
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US07/025,166
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English (en)
Inventor
Vadim P. Ivchenkov
Nikolai A. Kaluzhsky
Eduard A. Isidorov
Viktor G. Sirotenko
Viktor S. Shusterov
Gennady A. Pakhomov
Fedor K. Teplyakov
Oleg S. Khromovskikh
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Vsesojuzny Nauchno-Issle I Proektny Inst Aljuminievoi Magnievoi
Spetsialnoje Konstruktorskoje Bureau Prokatdetal
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Vsesojuzny Nauchno-Issle I Proektny Inst Aljuminievoi Magnievoi
Spetsialnoje Konstruktorskoje Bureau Prokatdetal
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium

Definitions

  • the present invention relates to the art of metallurgy of non-ferrous metals and alloys and, more specifically, to processes for producing an aluminium-silicon alloy with a content of silicon of 2-22% by mass.
  • This alloy is useful for making shaped foundry articles for the automobile industry, tractor manufacture and in the manufacture of consumer goods.
  • a disadvantage of the prior art processes resides in that the process for the production of an aluminium-silicon alloy is conducted at elevated temperatures (780°-820° C.) which results in an increased content of hydrogen and aluminium oxide in the final alloy. This, in turn, impairs quality of the resulting alloy and in increased irrevocable losses of the charge materials.
  • the melt jet is directed to the bottom of the cone of the charged crystalline silicon; the speed of the melt jet along its axis is maintained equal to 0.5-0.8 m/s; simultaneously with the beginning of agitation the melt temperature in the furnace bath is lowered to 670°-750° C. and the melt agitation is effected at this temperature.
  • the present invention provides casting of liquid aluminium into the bath of a reverberatory furnace at a temperature within the range of 780° to 820° C. This casting temperature is selected due to a specific character of operation of the reverberatory furnace and conditions of the process for producing the alloy in this furnace.
  • the melt jet is directed to the base of the cone of charged crystalline silicone at the speed (along the jet axis) equal to 0.5-0.8 m/s. It is inadvisable to supply the melt jet at a speed along its axis of less than 0.5 m/s, since in doing so the movement of the melt in the bath comes into a calm laminar flow, whereby the effectiveness of agitation is reduced (i.e., the efficiency of heat- and mass-transfer processes within the melt bulk in the furnace bath is lowered). It is neither expedient to supply the melt jet at a speed along its axis of more than 0.8 m/s, since it is economically inefficient because no improvement of the process parameters takes place upon a further increase of the supply rate.
  • the melt temperature in the furnace bath is lowered to 670°-750° C. and the melt agitation is effected at this temperature. It is not advisable to carry out the process at a temperature below 670° C., since this results in a higher viscosity of the melt, lesser efficiency of agitation and, hence, in an extended time of silicon dissolution. Carrying out the process at a temperature above 750° C. results in an undesirable increase of hydrogen solubility in the alloy and greater losses of aluminium due to oxidation thereof.
  • the process for producing an aluminium-silicon alloy with a content of silicon of 2-22% by mass according to the present invention is effected in the following manner.
  • the required amount of crystalline silicon is charged through an opening in the furnace crown, the charged crystalline silicon has a cone shape. Then the predetermined amount of liquid aluminium is charged into the furnace bath at a temperature of 780°-820° C. Then the resulting aluminium-silicon melt is stirred by means of a shaped jet of the same melt.
  • the melt jet can be formed, for example, using centrifugal pumps available from "Carborundum", a US company, gas-dynamic pumps, electromagnetic agitating means (cf. A. D. Andreev, V. B. Gogin, G. S.
  • the shaped jet of the melt is directed into the base of the cone of the charged crystalline silicon so that the speed of the melt jet along the axis thereof is kept within the range of from 0.5-0.8 m/s.
  • the melt temperature in the furnace bath is lowered to 670°-750° C. and the agitation of the melt is conducted at this temperature.
  • the temperature reduction to the above-specified values can be effected by disconnecting the heat source or by ensuring a forced heat removal with the view to further use it in other processes.
  • the readiness of the alloy is determined by the results of express analysis for the content of the main components of the alloy and content of impurities, whereafter the final alloy is cast into moulds.
  • the melt readiness is determined by the result of an express-analysis for the content of the main components of the alloy and content of impurities, whereafter the final alloy with the content of silicon of 11.4% by mass is cast into an ingot mould.
  • Table 1 shows examples of realization of the process according to the present invention.
  • Efficiency of the process according to the present invention is assessed by the results of analysis of the alloy for the content of hydrogen and aluminium oxide, as well as by the composition of slags. For the purpose of comparison, efficiency of the prior art processes is also assessed using the same parameters.
  • the content of hydrogen and aluminium oxide in the alloy is determined using the procedure described in the book by M. B. Altman, A. A. Lebedev, M. V. Chukhrov “Melting and Casting of Light Alloys", 1969, “Metallurgiya” Publishing House, Moscow, pp. 663-674. Analysis of the slag compositions is effected by conventional chemical and analytical methods.
  • Table 2 hereinbelow shows the efficiency characteristics of the process according to the present invention and prior art processes determined using the above-mentioned procedures.
  • Comparative analysis of the data shown in Table 2 shows that the use of the process according to the present invention makes it possible to reduce the content of hydrogen in the final alloy by 22% on the average, that of aluminium oxide in the form of disperse inclusions--by 50% on the average, the content of aluminium oxide in the form of large-size inclusions and scabs--by 70% on the average. Furthermore, the total content of aluminium and silicon in slags is reduced by 25% on the average.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Silicon Compounds (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US07/025,166 1986-09-29 1987-03-04 Process for producing aluminium-silicon alloy with content of silicon of 2-22% by mass Expired - Fee Related US4808375A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1986/000095 WO1988002410A1 (en) 1986-09-29 1986-09-29 Method of obtaining aluminosilicon alloy containing 2-22 per cent by weight of silicon

Publications (1)

Publication Number Publication Date
US4808375A true US4808375A (en) 1989-02-28

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ID=21617038

Family Applications (1)

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US07/025,166 Expired - Fee Related US4808375A (en) 1986-09-29 1987-03-04 Process for producing aluminium-silicon alloy with content of silicon of 2-22% by mass

Country Status (9)

Country Link
US (1) US4808375A (it)
EP (1) EP0283518B1 (it)
JP (1) JPH01501320A (it)
AU (1) AU597926B2 (it)
DE (1) DE3671473D1 (it)
IN (1) IN169435B (it)
NO (1) NO882212L (it)
RO (1) RO101828B1 (it)
WO (1) WO1988002410A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5069875A (en) * 1989-10-16 1991-12-03 Nikkin Flux Inc. Method of adding silicon to aluminum
US5366691A (en) * 1990-10-31 1994-11-22 Sumitomo Electric Industries, Ltd. Hyper-eutectic aluminum-silicon alloy powder and method of preparing the same
CN107214309A (zh) * 2017-05-17 2017-09-29 东北大学秦皇岛分校 一种改善高硅铝合金组织性能的方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU629429A1 (ru) * 1977-05-16 1978-10-25 Специальное конструкторское бюро магнитной гидродинамики института физики АН Латвийской ССР Миксер

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB404463A (en) * 1932-06-02 1934-01-18 Aluminium Ltd Improvements in or relating to aluminium silicon alloys and methods of manufacturingthe same
US4008884A (en) * 1976-06-17 1977-02-22 Alcan Research And Development Limited Stirring molten metal
US4046558A (en) * 1976-11-22 1977-09-06 Aluminum Company Of America Method for the production of aluminum-silicon alloys
US4053303A (en) * 1976-12-06 1977-10-11 Aluminum Company Of America Method of carbothermically producing aluminum-silicon alloys
DE2735544A1 (de) * 1977-08-06 1979-02-15 Hansa Metallwerke Ag Steuerscheibensatz fuer eine mischbatterie sowie einen derartigen steuerscheibensatz enthaltende mischbatterie
DE2837510C3 (de) * 1977-08-30 1981-10-22 Gennadij Vasil'evič Kujbyšev Čerepok Verfahren und Vorrichtung zur gasdynamischen Vermischung von flüssigen Metallen
US4235626A (en) * 1978-12-19 1980-11-25 Dolzhenkov Boris S Method and apparatus for stirring molten metal
SE450583B (sv) * 1982-10-22 1987-07-06 Skf Steel Eng Ab Sett att framstella aluminium-kisel-legeringar
SU1180396A1 (ru) * 1984-04-02 1985-09-23 Предприятие П/Я А-7504 Способ приготовлени алюминиево-кремниевых сплавов

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU629429A1 (ru) * 1977-05-16 1978-10-25 Специальное конструкторское бюро магнитной гидродинамики института физики АН Латвийской ССР Миксер

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
"Alloys of Aluminium with Silicon", by G. B. Stroganov, et al., 1977, Metallurgiya Publishing House, Moscow, pp. 208-211.
"High-Productivity Melting of Aluminum Alloys", by A. D. Andreev, et al., 1980, Metallurgiya Publishing House, Moscow, pp. 89-95.
"Melting and Casting of Light Alloys", by M. B. Altman et al., 1969, Metallurgiya Publishing House, Moscow, pp. 663-674.
"Metallurgy of Aluminium", by I. A. Troitsky, et al., 1977, Metallurgiya Publishing House, Moscow, p. 367.
Alloys of Aluminium with Silicon , by G. B. Stroganov, et al., 1977, Metallurgiya Publishing House, Moscow, pp. 208 211. *
High Productivity Melting of Aluminum Alloys , by A. D. Andreev, et al., 1980, Metallurgiya Publishing House, Moscow, pp. 89 95. *
Melting and Casting of Light Alloys , by M. B. Altman et al., 1969, Metallurgiya Publishing House, Moscow, pp. 663 674. *
Metallurgy of Aluminium , by I. A. Troitsky, et al., 1977, Metallurgiya Publishing House, Moscow, p. 367. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5069875A (en) * 1989-10-16 1991-12-03 Nikkin Flux Inc. Method of adding silicon to aluminum
US5366691A (en) * 1990-10-31 1994-11-22 Sumitomo Electric Industries, Ltd. Hyper-eutectic aluminum-silicon alloy powder and method of preparing the same
CN107214309A (zh) * 2017-05-17 2017-09-29 东北大学秦皇岛分校 一种改善高硅铝合金组织性能的方法

Also Published As

Publication number Publication date
IN169435B (it) 1991-10-19
JPH01501320A (ja) 1989-05-11
DE3671473D1 (de) 1990-06-28
EP0283518B1 (de) 1990-05-23
EP0283518A1 (de) 1988-09-28
EP0283518A4 (de) 1989-01-19
RO101828B1 (en) 1992-07-15
NO882212D0 (no) 1988-05-20
AU6726387A (en) 1988-04-21
WO1988002410A1 (en) 1988-04-07
NO882212L (no) 1988-05-20
AU597926B2 (en) 1990-06-14

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